# dark grey background instead of pure black
background=0.2
mpv prints:
Invalid value for option background: 0.2
Valid values are:
none
color
tiles
Error parsing option background (option parameter could not be parsed)
/home/user/.config/mpv-image-viewer/mpv.conf:14: setting option background='0.2' failed.
https://github.com/occivink/mpv-image-viewer/blob/master/mpv.conf#L11
mpv prints:
https://mpv.io/manual/stable/#options-background